Collapsible core.



M. D. STEELE.

COLLAPSIBLE CORE.

APPLICATION FILED own. 1913.

Patented May16-,1916.

MACK DONAL STEELE, OF BLACKSVILLE, WEST VIRGINIA.

COLLAPSIBLE CORE.

messes.

Specification of Letters Patent.

Patented May 16, 1.214%.

Application filed December 23, 1913. Serial No. 808,455.

To all whom it may concern:

Be it known that I, MACK D. STEELE, a citizen of the United States,residing at Blacksville, in the county of Monongalia, State of WestVirginia, have invented certain new and useful Improvements in C01-lapsible Cores; and I do hereby declare the following to be a full,clear, and exact de scription of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

The present invention is directed to collapsible cores, and moreparticularly to one designed for making cement wells or the like.

The invention has for its object to so construct a core of this typethat the sections thereof may be firmly locked in their expandedpositions, said sections being also capable of being easily and quicklycollapsed to permit ready removal of the core.

With this and other objects in view, this invention resides in the novelfeatures of construction, formation, combination and arrangement ofparts to be hereinafter more fully described, claimed and illustrated inthe accompanying drawing, in which 2 Figure 1 is a front view of thedevice. Fig. 2 is a plan view showing the parts in the positions theywill occupy when the device is being used as a mold. Fig. 3 is avertical sectional view showing the core in its open position. Fig. iisa similar view on line 4.-t of Fig. 1, showing the core eX- panded. Fig.5 is a similar section taken at right angles to Fig. 3, and Fig. 6 is alongitudinal sectional view.

The core consists of sections 1 and 2, said sections being semicircularin cross section and have their rear edges provided with hinge plates 3,which are pivotally connected by the pintle 4, which is readilyremovable so that the sections may be separated for nesting. Connectedto the interior surfaces of the sections 1 and 2 are clips 5, said clipsconsisting of plates 6, the edges of which terminate in inward extendingflanges 7, said flanges being spaced apart for slidably receiving theoperating plate 8, said operating plate being provided near its upperand lower ends with spaced inclined slots 9 which slidably engage thebolts 10 which are passed through flanges 7 of the clips.

The extreme upper end of the operating plate 8 is provided with anopening 11,

which serves as a medium for receiving a bar or tool for raising orlowering the plate so as to expand or contract the sections 1 and 2. Theforward edge of the section 1 is rabbeted, as at 12, for receiving oneedge of the strip 13, which is secured in the rabbeted portion 12, theother edge of which is adapted to overlap the adjacent edge of thesection 2 so that the core will be practically circular in cross sectionwhen in its operative position.

A headed lug 14; is carried by the operating plate 8, the same beinglocated adjacent the upper end thereof and is designed to be engaged bythe bill 15 of the hook 16, said hook having its lower end piv0t allyconnected to one of the bolts 10 carried by one of the uppermost clips 5and when the bill 15 is engaged with the stud 14 the bolts 10 haveridden upwardly in the slots 9, thus holding the sections in theirexpanded position.

WVhen it is desired to remove the core it is only necessary to disengagethe bill 15 from the stud 14, whereupon the operating plate 8 may bemoved upwardly, during which time the bolts 10 will ride downwardly inthe slots 9, thus permitting the sections to collapse.

When the above operation has been accomplished the pintle 4 is withdrawnfrom the hinges 3 and the sections 1 and 2 of the core moved in circularpaths until the edges remote from the hinge edges abut. At this time thetubular portions of the hinged plates of each hinge will be moved out ofalinement so that each section may have independent movement. This willbe advantageous inasmuch as the sections may be loosened from the cementmore readily when they are acted upon independently. Of course afterthey are loosened they may be readily withdrawn together. It is for thisreason that I have made the pintle 4.- removable.

What is claimed is In a collapsible core, a pair of semi-cylindricalhollow sections, the edges thereof being arranged in alinement, a pairof hinged plates having tubular ears thereon secured to the inner faceof one of the sections, an additional pair of hinged plates havingtubular ears thereon secured to the inner face of the other section, thesaid tubular ears being in alinement, a rod extending through thetubular ears of all of the hinge plates,

e s is si sa s? gr} e n rs i. 1 1 a a strip secured to the edge of oneof the sections opposite the hinge plates thereon, the said stripoverlapping the adjacent edge of the other section, and means to movesaid sections about the aforementioned rod as a pivot so as to spreadthe free ends thereof Within the extent of the said strip, the said rodbeing removable from the ears whereby the sections of the core may bemoved in circular paths until the edges remote from the hinged edgesabut and the tubular portions of the hinge plates move out of alinementso that the sections of the core may be loosened independently.

In testimony whereof, I afliX my signature, in the presence of twoWitnesses.

MACK DONAL STEELE. Witnesses:

L. L. THOMAS, JNo. A. GAFFNFIY.

Go'pies of this patent may be obtained for fiv": cents each, byaddressing the Commissioner 6: Pa'tnts, Washington; D. C?

